Means or apparatus relating to the manufacture, centrifugally, of hollow articles.



D. MOIR & H. BUCHANAN.

MEANS 0R APPARATUS RELATING T0 THE MANUFACTURE, CENTRIFUGALLY, 0F HOLLOW ARTICLES. APPLICATION FILED IAN- 25. 19|?. 1,286,056.

3 SHEETS-SHEET I.

Patented Nov. 26, 1918.

I I O O O O L I FIKLIIMIIII IIIIMIIII I I NITNIIVI INH I In III NNIIIIIIII .In I I ILIII I .L I7 .II II.- I IT .PIII

I I I I ,I MIIHIII I II I ,1 I .I I IIIIITITI I-, III -I ...MII I L I II I III ILL E III II- I.. II I I .,\I-IOIIII IOIIIIOIIIII I @IIIIIm .W %mfbffs\ K Mk w IIIII I I n. Mom & H. BUCHANAN.

MEANS 0R APPARATUS RELATING -TO THE MANUFACTURE, CENTRIFUGALLY. 0F HOLLOW ARTICLES.

yAPPLICATION FILED :AIL-26.1911.

Patented Nov. 26, 1918.

3 SHEETS-SHEET 2.

D.MOH& H.BUCHANAN MEANS 0R APPARAIUS RELATING TO THE MANUFACTURE,CENTRIFUGALLY,0F HOLLOW ARTICLE&

APPLICATION FILED JAN. 26,191?- 1,286,056. Patented Nov. 26, 1918.

3 SHEETS-SHEEI 3.

r /Coj Uurrnp sTA'rEs rA'rnNfr onirica.

DONALD IIOIR AND HUGH BUCHANAN, 0F ROSARIO DE SANTA F, ARGENTINA.

MEANS OR APPARATUS RELATING TO THE MANUFACTURE, CENTRIFUGALLY, HOLLOW ARTICLES.

Specification of Letters Patent Original application filed February 12, 1916, Serial No. 77,972. Divided and this application filed January 26, 1917. Serial No.144,662.

To all 'whom it may concern: v

Be it known that we, DONALD Mom and HUGH BUCHANAN, subjects of the King of Great Britain and Ireland, residing, respectively, at Rosario de Santa F, Argentine Republic, have invented Improved Means or Apparatus Relating to the Manufacture, Centrifugally, of Hollow Articles, of which the following is a specification.

' This invention relates to means or apparatus for the manufacture of articles, centrifu- Vgally such for example as concrete pipes and other hollow ware having smooth internal surfaces.

In such manufacture, arrangements have been proposed according to which material, such for example as cement or lime concrete or other suitable agglomerate intended to be subjected to centrifugal action, is to be received by a configuring member confined within outer inclosing means designed to resist the bursting stresses to which the inner configuring member is to be subject, such configuring member being designed to be removed as soon as the material has been sufficiently acted upon by centrifugal force.

The present invention which is a division of our application for patent dated 12th February, 1916, Serial No. 77,972, is applicable, whether the smooth internal surfaces are to be the final stage or articles made throughout by a centrifugal method of production, or the linings, produced centrifugally, of articles made in any other way, consists in an arrangement whereby inner configuring members having a variety of forms differing widely it may be from the outer supporting means, can be accommodated by the supporting means, within the range of its capacity, and be easily removed therefrom.

Another feature of the invention is an improvement in means for smoothing the internal surface of the article produced and consists in a device for adjustably removing superfluous surface material simultaneously throughout the length ofthe article and delivering it into a collector.

It will be understood that the inner mold will be shaped to suit the required exterior formation of the pipe, colunm or the like and also that the invention can be usefully adapted to the lining of articles such as pipes with material for purposes such as the strengthening, water-proofing or finishing of the same.

In the accompanying drawings, Figure l is a longitudinal and Fig. 2 a transverse section on the line A A of Fig. l, showing one form of centrifugal-mold arrangement as used for the manufacture of a reinforced pipe, cylindrical throughout, both externally and internally. Figs. 3 and 4 are similar views of a modified arrangement for use in the manufacture of a spigot and faucet pipe. Figs. 5 to 8 are diagrammatic views of means for adjustably removing surface material simultaneously throughoutthe length of the article and collecting it, and Fig. 9 is a view of the general arrangement of plant according to the invention.

Referring first to Figs. 1 and 2, a is the bearing of a horizontal driving shaft I) provided with a boss or head c that is furnished with a collar or fiange/al.v To this collar l is bolted one half e of a cylindrical casing that has flanges f enabling it to be securely bolted to the flanges g of a companion casing part h. The inner mold comprisesa sheet i of metal bent into cylindrical form having scarfed overlapping edges at j. This mold is supported within and from the casing parts e, h .by rings 7c intermediate of its length and by ring formers m at the ends. The rings 7c, as can be clearly seen in Fig. 2, are each made in halves interengaging and 'connected together by pins n. The end formers m are made in separable parts in the same way as the rings lo. o represents a layer of suitable agglomerate which is first acted upon centrifugal-ly, p represents a. metal reinforcement which is next added and fr represents the subsequent layer of agglomerate centrifugally treated. The left hand end former m is of a radial depth sufficient to produce an end Wall accommodating both layers of agglomerate but in order to permit of the entry of the reinforcement p into the mold the right hand end former m is radially of lesser depth, having com- |bined therewith supplemental ring m1 which is fixed to the former m after the reinforcement p has been introduced and before the inner lawer 1' of agglemorate is formed.

InFigs. 3 and 4 the cylindrical mold z' of I`i s. 1 and 2 is replaced by a mold t which is iouldered at 2 to form a socket, the rings 701 and end` formers m2, mg being altered 1n dimensions to those employed in Figs. l and 2. ln other respects the apparatus is the same.

Fig. 9 shows means according to Figs. l and 2 or `to Figs. 3 and et mounted in relation to a distributing trough s the casing e, L being supported at one end by `a roller t. The trough s is carried upon a shaft u by eccentrics t) (Figs. 5 to 8) and is provided with a scraping edge w, a handled bolt m .being vshown as provided to engage one of the eccentrics u whereby the trough canbe clamped in different angular positions relatively to the shaft u. This shaft u is litted with a handle y and is revoluble in a sliding bearing e, the arrangement being such that the shaft and trough can be advanced longitudinally into the positions indicated in dot and dash lines where the end s1 of the shafts s enters a housing b1 in the end of the shaft b. Normally the trough s is clamped to the shaft u so that it can be freely moved longitudinally into the inner mold, as eX- emplied in Fig. 5, after which it can be turned by the handle y into a position (see Fig. 6) to enable its contents to be discharged. Afterward the angular position of the trough s in relation to the shaft u can be altered, as exemplified in Figs. 7 and 8, to vary the distance of the dressing edge 'w from the center of rotationwhich distance is a maximum in Fig. 8.

l/Vhat we claim is:-

1. Means for manufacturing hollow articles centrifugally comprisingin combination an inner removable centrifugal configuring` member, an outer casing adapted to resist the centrifugal stresses to which said inner member is subjected and means for dressing the interior surface of the article p-roduced simultaneously throughout its length and collecting-the removed material.

2. Means for manufacturing hollow articles centrifugally, comprising, in combination, a light sheet metal mold, a substantial outer rotary mold, positioning devices through which the inner mold is'supported against bursting stresses 'by the outer mold and a bucket feeding device having a dressing blade edge adjustably mounted within the sheet metal mold.

3. Means for manufacturing hollow articles centrifugally, comprising, in combination, a light sheet metal mold, a substantial outer rotary mold, positioning devices through which the inner mold is supported against the bursting stresses by the outer mold; a bucket feeding device having a dressing blade edge extending Within the sheet metal mold and means for moving the bucket feeding device ec'centrically in relation to the said mold.

4f. lin means for'manufacturing hollow articles centrifugally, the combination with a light inner mold, an outer heavy mold and positioning rings whereby the inner mold is supported against bursting stresses by the outer mold, of an end former of compound character comprising parts enabling it to be built up as the manufacture of the hollovvo articles proceeds.`

Signed at Rosario, Argentina, this second day of January 1917.

DONALD MOllR. HUGH BUCHANAN. 

